Megashifter - Wiring neutral safety switch
#1
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Car: 91 Z28
Engine: 383 SuperRam
Transmission: ProBuilt 700r4
Axle/Gears: G92 3.23
Megashifter - Wiring neutral safety switch
91 z28. when wiring my neutral safety switch up with a mega shifter the instructions say that some vehicles have 2 additional wires that tell the ecm that its in park/neutral, and to wire these up with the switch an additional relay is needed. i understand how the relay would work in this situation, but it seems at tho i can just tap the ecm side of these 2 wires into the wire that is closed of the neutral safety switch. the neutral safety switch puts out a ground signal, and the ecm receives a ground signal when in park/neutral, so i should be able to do this. am i missing something to where i should not do this?
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Car: '91 Z28 convertible
Engine: TPI
Transmission: T5
Axle/Gears: 3.27 posi disc
Re: Megashifter - Wiring neutral safety switch
You are right, technically it is the same function (grounded switch in Neutral or Park).
The only difference I can see is that the starting circuit is not always grounde but can have power on it (when cranking) and also flyback spikes from the solenoid.
For that reason, I would not recommend using the starting circuit for the ECM input.
I would strongly recommend using the relay.
Hope this helps.
Lou
The only difference I can see is that the starting circuit is not always grounde but can have power on it (when cranking) and also flyback spikes from the solenoid.
For that reason, I would not recommend using the starting circuit for the ECM input.
I would strongly recommend using the relay.
Hope this helps.
Lou
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Car: 91 Z28
Engine: 383 SuperRam
Transmission: ProBuilt 700r4
Axle/Gears: G92 3.23
Re: Megashifter - Wiring neutral safety switch
after running over my wiring diagrams again, you are absolutely right, i totally forgot about the starter running thru the wires. thanks for clearing that up for me, i'm going to run the relay. thanks.
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Car: 89 IROC
Engine: LSX 6.0 370, TU2 Cam, Fast intake
Transmission: T56 w/ lots of goodies
Axle/Gears: 8.8, Posi, 4.10, 31 Spline
Re: Megashifter - Wiring neutral safety switch
when I did mine before I just connected the thick yellow and purple wires together and it worked as the loop it completed like it would be on a stock shifter
#5
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Car: 91 Z28
Engine: 383 SuperRam
Transmission: ProBuilt 700r4
Axle/Gears: G92 3.23
Re: Megashifter - Wiring neutral safety switch
but that would let it start in any gear, i'd rather have a relay to prevent that.
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